Tensioning device for warp-beams, &amp;c.



A. 'BRUNELLE. TENSIONING DEVICE FOR WARP BEAMS, 6w.

.irmonmn FILED no. 19, 1905.

No. 895,001. I

PATENTED AUGQ4, 190s.

j I .zsnnms-snsnr I Inventor,

. Attorneys cure ARSENE BRUNELLE, or MANVILLE, RHODE ISLAND.

IENSIONING DEVICE FOR WARP-BEAMS, 88c.

T all whom it may concern:

Be it known that I, Ansiaxn BRUNELLE, a citizen of the United States, residing at Manville, in thecounty of Providence, Stateof Rhode Island, United States of America,- have mvented certain new and useful Imirovements in Tensioning Devices for -Warp earns, &e. and I do hereby declare that the following is a full, clear, and exact descri tion of the invention, such as will enab e others skilled in the art to which it appertains to make and use the same.

My invention relates to tensioning devices, and it consists in' the constructions, combinations and arrangements herein described part of this ap ication and in which similar reference 'sym ols indicate corresponding parts in the several views z-Figu-re 1. is a side elevation, illustrating one embodiment of my invention a plied to a loom; Fig. 3 is a rear elevation o the parts shown in Fig. 1 Fig. 3 is a rear elevation, on a larger scale, of the tensioning device shown in Fig. :2; Fig. 4 is a vertical longitudinal section of the construction shown in Fig. 3 Fig. 5 is an elevation of the right hand end of Fig. 3; Fig. (3 is a sectional view on the line 6-6 of Fig. 3; Fig. 7 is a view similar to Fig. 5, with the pawl and its plate removed; and Fig. '8 is a perspective view of the pawl and plate shown in Fig. 5. Referring to the drawings,Aindicates any usual frame on which are rotatably supported the beams B provided with driving oars D. The beams carry spindles {J whic i liave secured at their outer ends friction pulleys E. Friction bands F, secured to the frame at G, extend in any usual manner about the respective (pulleys E and havetheir free ends so- -by chains to independent tensioning members hereinafter described.

'- p A plate 10, carrying a spindle 1.1 is secured by bolts 10 to a bracket 9 on the frame; said spindle being provided with an annular shoulder 13 and a reduced portion 12 extending therefrom.

Specification of Letters Patent.

v i Application filed August 19, 1905. Serial No. 274,840..

Patent-ed Aug. 4,1908.

Two independent members 14 and are rotatably mounted on the spindle 11; the

m es-ismomE member 24 being provided with an annular flange for engaging the shoulder 13 of the spindle to loperly space said members.

A hchca sprmg 21 has its ends 20 and 22v secured, respectively, to the independently rotatable members 14 and 24; whereby'thc tension of said spring can be adjustedby r0 t-ating either of said members.

The member 14 is provided with a toothed annular flange 15. for engagement by a gravity actuated pawl 17 to lock said member against rotation under the tension of the spring 21.

The member 24 is provided with a corresponding toothed annular flange 25, for engagement by'a. pawl 41 to lock said member against rotation under the tension of the spring 21. As shown especially in Fig. 8, t e pawl 41 is pivot-a ly carried at 42 by a plate 37 provided with lugs 38 adapted to fit a slot in the end of the spindle 11 ;said plate being secured in position by a screw extending through an opening 39 in said plate and threaded into an opening 36 in the spindle.

' The members 14 and 24 constitute drums for the attachment, respectively, of chains and 46 connected to the friction bands F of the friction pulleys E.

The drum 24 is provided with an annular flange 29 for rotatably supporting a member 31 provided with an arm 32- said arm being shown provided with a screw stop 33 adapte to engage openings 34 in thedrum 24- for manually rotating said drum to adjust the spring 21. The drum 14 is shown provided with spanner and recesses 19,to provide convenient .means for rotating said drum by a spanner wrench 23 to adjust the tension of the spring 21.

From the above description, it will be clear that the friction exerted by the bands F on the friction pulleys E secured to the spindles C can be efliciently and conveniently regulated by rotating either of the independently rotatable members 14 or 24 to adjust the tension of the sprin 21.

I have illustrated and described a )referred and satisfactory construction, but, obviously, changes could be made within the spirit and $00 e of my invention.

h rom the preceding detailed description it will be clear that when the chain 45 is wound u up bythe drum 14 and sprin T ions,

gamst rotation under the action of said.

crease the friction of the strap l on the ulley E, thus tensioning one of the beams and that when the chain is allowed to slacken and unwind, the reverse will take place and the tension will be removed from the beam. Of course the same is true of the tensioning of V the other beam through the chain 46, the drum 24 and the remaining) strap F.

Having thus descrl ed my invention, what I claim as new therein and desire to secure by Letters Patent is:--

v '1; A tensioning device for friction bands comprising a pair of rotatable members constituting attachments for the ends of independent friction binds, a common tension member connected to'said rotatable members and tending to rot-aftethe latter, and detachable means for locking said rotatable members against rotation under the action of said tension member, substantially as described.

A tensioning device for friction bands effOlfiZJllSlllg a pair of rotatable drums constituting attachments for the ends of independent friction bands, a spring connected to ,said drums and tending to rotate the latter, and means detachably engaging said drums for locking them against rotation under the action of said spring, substantially as described.

3. A tensioning device for friction bands comprising a spindle, a pair of drums rotatab'ly mounted thereon and constituting attafchments for the ends of independent friction bands, a spring connected to said drums and tending to rotate them in opposite direcand means for locking said drums spring, substantially as described.

lIxA tensiomng device for friction bands comprising a spindle, a pair of drums rotatably mounted thereon and constituting attachments for the ends of independent friction hands, a spring connected to said drums and tending to rotate them in 0p osite directions, means for independent yrotating either of said drums for adjusting the tension of said s ring, and detachable means engaging said c rams for locking them against rotation under the action of said spring, substantially as described.

5. A tensioning device for friction bands comprising a spindle, a pair of drums rotatabiy mounted thereon and constituting attachments for the ends of independent friction hands, a shoulder on said spindle for axio 21, it will in-' ally spacing said drums, a spring connected to said drums and tending to rotate them in opposite directions, means for independently rotating either of said drums for adjusting the tension of said s ring, and detachable means engaging said ruins for locking them against rotation under the action of said spring, substantially as described.

6. A tensioning device for friction bands comprising a spindle, a pair of drums rotatably mounted thereon and constituting attachments for the ends of independent frictionbands, one of said drums being provided with an enlarged bore throughout a portion of its length, a spring mounted in said enlarged bore and connected at its respective ends to said two drums and tending to rotate the latter, and means for locking said drums against rotation under the action of said spring, substantially as described.

7. A tensioning device for friction bands comprising a spindle, a drum rotatably mounted on said spindle and constituting an attachment for the end of a friction band, said drum being provided with an enlarged bore throughout a portion of its length, a

shoulder on said spindle, a second drum r0 tatably mounted on said spindle and provided with a flange engagin said shoulder, a spring mounted in said elilarged bore and connected at its respective ends to said two drums, and tending to rotate the latter, and means for locking said drums against rotation under the action of said spring, substantially as described. i

8. A ,tensioning device for friction bands comprising a. spindle, pair of drums rotatably mounted thereon and constituting attachments for the ends of independent friction bands, one of said drums being provided with anenlarged bore throughout a. portion of its length, a spring mounted in said enlarged bore and connected at its respective ends to said two drums and tending to rotate the latter, meansfor locking said drums. against rotation under the action of saldk spring, and means for independently rotating either of said drums to adjust the tension of said spring, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

AnsENn BRUNELLE.

GEORGE PINSONNEAULT, v JOHN B. Dnusnn; X 

